In this MOOC, we will focus on learning how network systems are secured using firewalls and IDS. This will include understanding the basic components of network security, constructing a dual-firewall DMZ, and defining security policies to implement and enforce these rules. Building upon these lessons we will go in-depth on the popular Linux firewall. Finally we will learn about Network IDS and Host IDS, including a deep dive into Snort.

From the lesson

Implement Firewall with Linux IPTable

In this module, we will learn how to use Linux iptables to implement firewall rules for filtering packets, and SNAPT or DNAT address port translation, and the security policies.